Honing tool and power drive therefor



Dec. 22, 1970 s. R. HELD. 3,543,543

' HONING TOOL AND POWER DRIVE THEREFOR Filed Feb. 19, 1969 2Sheets-Sheet 1 INVENTOR 3 GERHARD R. HELD ATTORNEYS Dec. 22, 1970 G R,HELD 3,548,548

HONING TOOL AND POWER DRIVE THEREFOR Filed Feb. 19, 1969 2 Sheets-Sheet2 3 64 INVENTOR 42 GERHARD R. HELD BY fi ATTORNEYS United States Patent3,548,548 HONING TOOL AND POWER DRIVE THEREFOR Gerhard R. Held, 22644Shiell Drive, Mount Clemens, Mich. 48043 Filed Feb. 19, 1969, Ser. No.800,448 Int. Cl. B241) 5/06, 9/02 U.S. Cl. 51-90 11 Claims ABSTRACT OFTHE DISCLOSURE BACKGROUND OF THE DISCLOSURE Heretofore, in honing toolsof the conventional type, there is provided a power rotated housingwhich mounts normally a plurality of circularly spaced honing stones ofsquare or rectangular shape which are capable of simultaneous radialoutward and inward adjustment with respect to the housing. The housingis usully of a solid body construction with milled and ground in slotsfor the honing stones and guides.

The honing surface of the honing stones conform to the shape of thearticle being honed. They are pressed flat and hard against the wall ofthe article and will stay there at all times during the honing cycle.Since the honing stone are pressed flat against the surface metalparticles become trapped between the stones and the honed surface. Forthis reason the stones are so constructed that they will gradually breakdown when more and more particles are trapped and the stress on theindividual cutters on the honing stone becomes too great to hold anylonger.

If the honing stones would be too hard and would not break down thenthey would load up and would cause more heat, no more honing action, mayeven break the honing tool. If the honing stones would be too soft theywould break down too fast.

If the honing stones have hard spots, these spots will load up and causestreaks in the work piece. In this way of honing where the stonesproduce a lot of rubbing and little cutting, much heat is developed andthe removal of metal is very small. The high pressure needed with thesetools can twist them or may even break them. The solid body constructionmakes repairs difficult and expensive. The removal of particles fromwithin the bore is done by a cooling and lubricating fluid.

BRIEF DESCRIPTION OF THE INVENTION It is an object of the presentinvention to Overcome the aforesaid difficulties in honing by providingan improved honing tool by which metal particles cannot be trappedbetween the honing wheels and the surface. Pressure and heat are reducedto a minimum. More metal can be removed faster and there is greatlyreduced streaking. The honing wheels may be harder since metal removalis done by the rotation of the Wheels. They also will last longer. Theconstruction of the present honing tool permits fast and easy repair.

It is another object to provide an improved honing tool by which inaddition to the ordinary conventional radial adjustment provided inconventional honing tools, the honing tool itself is individuallyrotatable as a cylindrical 3,548,548 Patented Dec. 22, 1970 wheel tothus provide a compound honing engagement with the bore.

It is a further object of the present invention to provide an improvedhoning tool which includes a chambered housing normally rotatable withina bore to be honed which chambered housing mounts a plurality ofcircularly spaced honing wheel holders which are pivotally mountedwithin the said housing and which are capable of radial adjustmentsrelative to the housing inwardly and outwardly thereof and with powermeans provided by which the honing tool housing is itself individuallyrotatable within the bore and wherein the individual honing wheels arethemselves, rotatable with respect to the supporting housing.

It is another object to provide a power means for transmitting rotativepower to the honing wheel housing at a first speed and speed changingmeans by which rotative driving power may be directed to the honingwheels for rotation at a second speed.

It is another object to provide an r.p.m. changer by which the presenthoning tool may be adapted to existing honing or other machine toolshaving a driving spindle for achieving rotative power as required forthe operation of the present honing tool.

These and other objects will be seen from the following specificationand claims in conjunction with the appended drawings in which:

FIG. 1 is a fragmentary partly sectioned and broken away view of ther.p.m. changer for the present honing tool.

FIG. 2 is a longitudinal section of the present honing tool partlybroken away for illustration.

FIG. 3 is a fragmentary section taken in the direction of arrows 33 ofFIG 2.

FIG. 4 is a fragmentary section taken in the direction of arrows 44 ofFIG. 2.

FIG. 5 is a fragmentary sectional view taken in a direction of arrows 55of FIG. 4.

FIG. 6 is a longitudinal section illustrating the mounting of the honingwheel.

With respect to the present honing tool such as shown in FIG. 2, thepower drive, therefore, may be provided by a machine which incorporatespower driving means for rotating the main drive shaft of the honing toolat a first speed and with additional power means for rotating the powerdriven hone drive shaft at a different or preferably increased speed.

As illustrative of possible speeds which might be employed, but withoutlimitation, the main drive shaft may be rotated in operation at a speedin the area between 300 and 400 r.p.m. whereas, the spindle drive shaftmay be rotated at speeds in the area generally between 1,000 and 2,000r.p.m., for illustration. For better results, under some conditions, itmay be advisable to run the honing wheels backward constantly.

Such power drive to main drive shaft and the hone drive shaft may beavailable in a machine designed for that purpose or alternately, thepresent honing tool can be adapted to existing machines by employing anr.p.m. changing device such as illustrated with respect to FIG. 1.

In view of the fact that there are many honing machines already on themarket, these can be adapted to drivingly engage the present honing toolmerely by the use of an r.p.m. changing device such as shown forillustration in FIG. 1. Thus, the spindle of the conventional honingmachine will drive the r.p.m. changer for two driving speeds. One speedwill be for the main drive shaft which will be the same r.p.m. as thespindle on the conventional honing machine, and at a second speed forthe hone drive shaft, which exact r.p.m. within the ranges aboveindicated will be determined by the gear relationship in the gearhousing of the r.p.m. changer hereafter described. Thus, the main driveshaft will be rotated at a first speed as transmitted by the spindle ofthe honing machine directly to the rpm. changer housing whereas thegearing within the rpm. changer will be such as to drive the powerdriven hone drive shaft at normally in increased speed.

As shown in detail in FIG. 1, the conventional honing machine includes ahousing fragmentarily shown in dotted lines at 23 and which includes aconventional spindle 12 fragmentarily shown having a bore 13 into whichprojects the hub 14 of the rpm. changer generally indicated at 11.

Said r.p.m. changer includes a gear housing 16 having disc 17terminating in an axial hub 14 including radially extending pins whichproject into and interlock within bore 13 of the spindle 12.

Said gear housing includes a second disc 18 in axial alignment with disc17 and interconnected by a series of parallel pins 19, there being asuitable gear chamber within the gear housing between the discs 17 and18.

A series of circularly spaced pinion gears 20 are journaled upon therespective pins 19 within said gear housing with portions of said gearsprojecting radially outward of the housing at all times in mesh with thestationary ring gear 21 which surrounds said housing and is anchored tosupport 22 mounted upon the honing tool or other support housing 23.

Thus, the pinions 20 are circularly arranged and spaced within andaround gear housing 16 and are adapted to rotate on axes parallel to thegear housing axis.

Driven gear 24 is rotatively nested and axially mounted within the gearhousing and is in mesh with the respective pinions 19.

The hone drive shaft 26 projects axially into said gear housing and isslidably keyed or splined as at 25 to the driven gear 24.'This honedrive shaft corresponds to the hone drive shaft 26 shown in FIG. 2.

The main drive shaft 27 for the honing tool of FIG. 2 is furthermoreshown in FIG. 1 as including a hub 28 of reduced dimensions splined orotherwise secured at 29 within disc 18 axially thereof for rotationtherewith.

The r.p.m. changer shown in FIG. 1 thus shows one structure by which thepower driving source which includes a spindle such as the spindle 12transmits rotative power to the main drive shaft 27 for the honing toolof FIG. 2 and a secondary different speed of rotation to the hone driveshaft 26 shown in FIGS. 1 and 2.

HONING TOOL The present improved honing tool illustrated in FIGS. 2through 6 as at 30, FIG. 2 includes the longitudinally spaced bearings31 which are interposed between main drive shaft 27 and the hone driveshaft 26 which is axially journaled therethrough. The bearings may bebrass, ball or roller bearings.

The main drive shaft 27 includes the drive pins 15 by which drivingengagement is established with a suitable drive source such as the gearhousing or the spindle 12 from a honing machine or other machine toolfor achieving a rotatable power drive to the main drive shaft 27 at apredetermined speed.

The hone drive shaft 26 which is journaled through said main drive shaftis adapted for connection to a secondary power drive such as the rpm.changer shown in FIG. 1. It is contemplated that some other power drivecan be employed for the hone drive shaft 26 which is adapted for drivingsaid shaft at a speed different and normally in access of the speed ofthe main drive shaft as set forth above.

The honing tool includes a chambered housing as desig nated generally atdefined by gear housing 32 having a chamber or bore 33 and which has anaxial hub splined or otherwise secured as at 34 axially to the maindrive shaft 27.

Said gear housing includes cover plate 35.

The chambered housing of the honing tool also includes spaced from thegear housing 32, the axially arranged bottom plate 36. Bottom plate 36is interconnected with the gear housing by a series of parallel spacedhoning wheel holder pivot pins 39 anchored within corresponding recessedbores 37 and secured by Allen screws 38, FIG. 2. The said pins arearranged in a circle parallel to the housing axis and outwardly thereof.

A plurality of circularly spaced honing wheel holders 40 are nestedwithin the chambered housing 30 and are pivotally mounted off centerwithin and around the said housing on axes parallel to and outward ofthe housing axis and which include the mounting pins 39.

As best shown in FIGS. 4 and 5, the individual honing wheel holders 40include the elongated outwarding diverging side plates 41, FIG. 5, endplates 42 and the arcuate bottom plate 43.

The respective honing wheel holders 40 are pivotally mounted upon theirrespective pins 39 which extend through end plates 42 so that a means isprovided by which the respective honing wheel holders are adapted forradial inward and outward adjustments with respect to the main honingtool chambered housing 30.

For this purpose, projecting radially inward from each of the bottomwalls of the respective holders are a pair of longitudinally spacedadjusting cam pins 44. These pins project through corresponding radialapertures or bores 45 formed through and around cylindrical sleeve 46 asbest shown in FIG. 2.

Sleeve 46 is axially joined to the gear housing plate 35 within thecounter bore 47 or recess and at its other end, is snugly projectedwithin the tapered flange 48 formed axially within the bottom plate 36forming a part of the honing tool housing.

A pair of axially aligned expansion cones 49 are slidably nested withinthe bore of the sleeve 46 and secured axially to one end of the honedrive shaft 26 by the transverse pin 50.

The respective expansion cones 49 are in operative engagement with thecorresponding radial adjustment pins 44 whereby longitudinal adjustmentof the hone drive shaft in a conventional manner as desigated by thearrow 51 is adapted to effect radial in and outward adjustments of therespective honing wheel holders 40 pivotally with respect to theirmounting pins 39. As shown, fragmentarily in FIG. 4, suitable leafsprings 67 are provided for normally biasing the respective holders 40and the corresponding pins 44 into operative engagement with expansioncones 49.

Within each of the honing wheel holders, 40, there is provided acylindrical honing stone 52 of conventional honing material such asvarious carbides including silicon carbide, for illustration, whichhoning wheels are journaled within the respective honing wheel holdersfor power driven rotation therein. As shown best in FIGS. 2 and 4, thesaid cylindrical honing wheels are power driven and journaled within therespective honing wheel holders upon axes parallel to the axis of thehone drive shaft and project radially outward of the housing 30 adaptedfor operative engagement with the bore to be honed.

The specific mounting of the cylindrical honing wheel or stone 52 isillustrated in FIGS. 5 and 6. Each of the honing wheel holders includesa central elongated cham ber 53 with the respective end walls 42 of thesaid holder mounting bearings 54 for the bolt or shaft 65, FIG. 6journaled within the said bearings and providing a rotative power drivefor the honing wheel 52.

The composite shaft 65 in the nature of an Allen bolt, FIG. 6 isjournaled, therefore, within and upon the honing wheel holder 40 andprojects into the chamber or bore 33 of the gear housing and has securedthereon and within said housing the pinion gear 55.

Pinion 55 is in mesh with the idler pinion 56, one such pinion beingmounted upon each of the pins 39 within the gear housing.

I Drive gear 57, FIG. 2, is also mounted within said gear housing; isslidably keyed as at 58 upon the hone drive shaft 26 and is in meshsimultaneously with all of the pinions 56 such as shown in 'FIGS. 2 and3.

Since the honing wheel holders 40 are capable of pivotal adjustment uponthe housing by virtue of their off center mounting with respect to thepins 39, FIG. 2, it follows that the power driven shafts 65 for theindivid' ual honing wheels in projecting into the gear housing are,therefore, adapted for arcuate adjustments with respect to the coverplate 35 of the gear housing. For this purpose and as shown in FIG. 3,said cover plate is provided with a series of arcuate slots 59 orclearance slots adapted to receive portions of the honing wheel driveshaft 65 with the pinion 55 at all times remaining in mesh with thecorresponding idler pinion 56.

The specific construction showing the assembly and mounting of thecylindrical honing wheel 52 is illustrated in detail in FIG. 6.

The abrasive cylindrically shaped honing wheel 52 has secured therein asby cement 61 an elongated sleeve 60 thus fixedly secured thereto andsaid sleeve at its outer ends being tapered at 62 and 63 to providetapered seats for the assembly upon and securing to drive shaft 65 whichis made in two parts.

The drive shaft for the respective honing wheel is in the nature of anAllen bolt 65 having a head with a taper corresponding to taper 62, FIG.6, and a shank which extends through the bore 64 of sleeve 60. The Allenbolt 65 includes a threaded end portion 66 which extends into acorresponding threaded portion of the shank 68 which projects axiallyfrom the drive gear 55. The shank 68 is journaled within a suitablebushing within the corresponding end plate of the wheel holder.

The shank 68 also has a tapered end portion corresponding to taper 63,FIG. 6, so that upon tightening of the Allen bolt 65 with respect tosleeve 68; the said Allen bolt assembly tightly and snugly engagessleeve 60 secured within the honing wheel 52 to complete the assembly.

Sleeve 68 forming a part of the drive shaft for the honing wheelterminates in the pinion 55 which is nested within the bore of the gearhousing and is in mesh with the idler pinion 56 for function andoperation in the manner above described.

Thus, while the individual wheel housings 40 are thus capable of pivotalmovement about the respective pins 39, the respective drive shafts forthe honing wheels are at all times in power drive engagement with thedriven pinions 56, FIG. 3, regardless of the amount of radial adjustmentof the respective wheel housings with respect to the bone housing 30.

Having described my invention, reference should now be had to thefollowing claims.

I claim:

1. A honing tool comprising a chambered housing;

a main drive shaft axially connected thereto to rotate said housing;

a plurality of circularly spaced honing wheel holders pivotally mountedolf center within and around said housing upon axes parallel to andoutward of the housing axis;

cylindrically shaped honing wheels rotatively journaled within saidwheel holders;

with portions of their surfaces projecting radially outward of saidhousing and adapted for simultaneous radial adjustments relative to saidhousing upon pivotal adjustment of said holders;

a power driven hone drive shaft rotatable at a different speed than saidmain drive shaft axially journaled through said main drive shaft andprojecting into said housing;

and gear means on said hone drive shaft connected respectively to eachof said honing wheels.

2. In the honing tool of claim 1, said housing including 6 a gearhousing at one end, and at its opposite end, a bottom plate;

said wheel holders interposed between said gear housing and bottomplate.

3. In the honing tool of claim 2, the pivot mounting of said wheelholders including a plurality of parallel spaced pins extendingrespectively through said gear housing to and secured to said bottomplate.

4. In the honing tool of claim 3, the mounting of each honing wheelincluding a shaft parallel to and spaced from each pin and journaledupon a Wheel holder and extending into said gear housing;

said gear means including a pinion gear secured on each shaft and nestedin the gear housing, a drive gear in said gear housing secured to saidhone drive shaft;

and idler gears in said gear housing, one idler gear journaled on eachpin, said idler gears intermeshed respectively with said drive gear andone of said pinion gears.

5. In the honing tool of claim 4, said gear housing having one Wall witha series of arcuate slots receiving said shafts respectively, providingfor arcuate adjustment of each of said shafts relative to said gearhousing, with the respective pinion remaining in mesh with an adjacentidler gear.

6. In the honing tool of claim 2., each wheel holder including atransversely arcuate bottom plate;

an axial sleeve interposed between the gear housing and bottom plate andincluding therethrough sets of radial slots corresponding to andadjacent said wheel holder bottom plates;

cam pins extending radially inward from said bottom plates through saidslots and into said sleeve;

and expansion cone means guidably mounted within said sleeve, engagingsaid pins respectively and secured to said hone drive shaft;

longitudinal adjustment thereof causing radial and pivotal adjustment ofsaid wheel holders.

7. In the honing tool of claim 6, and means normally biasing said Wheelholders inwardly against said expansion cone means.

8. In the honing tool of claim 1, each honing wheel holder includingapertured end plates;

the journal mounting of each honing wheel including a sleeve axiallyextending through and secured to a honing wheel;

a nut journaled in an end plate and extending into said gear housingincluding a pinion gear within said gear housing forming a part of saidgear means;

a bolt at one end journaled in an end plate extending snugly throughsaid honing wheel sleeve and axially secured to said nut;

said bolt and nut retainly gripping said honing wheel sleevetherebetween.

9. In the honing tool of claim 1, a power means including a housing anda drive spindle connected to said main drive shaft;

and an r.p.m. changer including driven means connected to said honedrive shaft.

10. In the honing tool of claim 9, said r.p.m. changer including arotatable gear housing connected to said drive spindle and to said maindrive shaft;

said hone drive shaft projected into said gear housing;

a driven gear in said gear housing slidably keyed to said hone driveshaft;

a series of circularly spaced pinions journaled within said gear housingrespectively in mesh with said driven gear;

said pinions projecting radially outward of said gear housing;

and a stationary ring gear mounted on said power means housing;

extending around said gear housing and in mesh with said pinionsrespectively.

11. In a honing tool including a main drive shaft adsaid pinionsprojecting radially outward of the said apted to rotatably drive a honehousing at a first speed, gear housing; and a hone drive shaft connectedto a series of honing and a stationary ring gear mounted on a stationarywheels for rotating the same with respect to said housing support,extending around said gear housing and at a second speed; 5 in mesh withsaid pinions respectively.

an rpm. changer comprising a rotatable gear housing axially connected toa power drive source and to said References cued main drive h ft; UNITEDSTATES PATENTS said hone drive shaft projected into said gear housing;1,803,701 5/1931 Grover 51347 a driven gear in said gear housingslidably keyed to 10 2,313,442 3/1943 Kline 51-349 said hone driveshaft;

a series of circularly spaced pinions journaled within OTHELL SIMPSONPnmary Exammer said gear housing respectively in mesh with said U.S. Cl.X.R. driven gear; 51-245, 346

